youtube-dl: Make it a a more complete ffmpeg image.

youtube-dl/Dockerfile

-FROM docker.io/library/debian:testing
+# hadolint ignore=DL3007
+FROM registry.shore.co.il/toolbx:latest
 # hadolint ignore=DL3008,DL3015
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y \
         ffmpeg \
+        libavcodec-extra \
+        libavfilter-extra \
+        libavformat-extra \
         youtube-dl \
     && \
     rm -rf /tmp/* /var/tmp/* /var/lib/apt/lists/* /var/cache/apt/archives/*